Home » Which day is celebrated on the first Sunday of May every year in various countries around the world? Important Days MCQs Which day is celebrated on the first Sunday of May every year in various countries around the world? September 10, 2022 1 View Q. Which day is celebrated on the first Sunday of May every year in various countries around the world? Coal Miners DayInternational Firefighter’s DayWorld Laughter DayWorld Homeopathy Day Answer: World Laughter Day